Bull Run or Bullrun may refer to:
Military
First Battle of Bull Run (First Manassas), 1861, the first major battle of the American Civil War
Second Battle of Bull Run (Second Manassas), 1862, a later battle also at Bull Run
Operation Bull Run, a military operation of the Iraq War and part of Operation Marne Torch
Bullrun (decryption program), a secret anti-encryption program run by the US National Security Agency (NSA)
USNS Bull Run (T-AO-156), an oil tanker
Places in the United States
Virginia
Bull Run (Occoquan River tributary), a stream in Fairfax, Loudoun, and Prince William counties, site of the Civil War battles
Bull Run, Fairfax County, Virginia, a census-designated place west of Centreville, northeast of the stream; See U.S. Route 29 in Virginia
Bull Run, Prince William County, Virginia, a census-designated place northwest of Manassas, west of the stream
Bull Run Mountain Estates, Virginia, a census-designated place in Prince William County, southwest of the stream
Bull Run Regional Park, on the stream in Fairfax County
Bull Run Mountains, a mountain range in Fauquier, Loudoun, and Prince William counties
Elsewhere
Bull Run Mountains (Nevada), a mountain range in Elko County
Bull Run (Deep River tributary), a stream in Guilford County, North Carolina
Bull Run River (Oregon)
Bull Run Lake, a reservoir, an impoundment of the river
Bull Run Hydroelectric Project, a former dam project on the river
Bull Run, Oregon, an unincorporated community named for the river
Bull Run National Forest, a former national forest
Bull Run Creek, a stream in South Dakota
Bull Run Fossil Plant also known as Bull Run Steam Plant, a coal-fired electric generating station owned by the Tennessee Valley Authority
Entertainment
Bull Run (novel), a young adult novel by Paul Fleischman about the First Battle of Bull Run
The Battles of Bull Run, a 1973 board wargame that simulates both battles of Bull Run
Bullrun Rally, an automobile rally in North America
Bull running, a defunct event once common in England, in which townsfolk chased down a bull then slaughtered it
Stamford bull run, the last surviving such event, ending in 1839
Tutbury bull run
Running of the bulls, events in Spain, Portugal, France, and Mexico, in which people run in front of a number of bulls, often used in bullfighting after the run
Bull Run (film), a 2024 American comedy
Other uses
Bull market or bull run, a rising market trend in economics